Silica modified with iron(III) oxide to support gold catalyst for low-temperature co oxidation

Abstract

Low-temperature oxidation of CO to CO2 plays a key role in broad application prospects. In order to achieve the low-temperature oxidation of CO, the gold catalyst was prepared using Fe2O3-modified SiO2 as support. The results showed that CO conversion was enhanced over the modified catalyst. At – 10 °C, CO conversion of 95 % could be achieved. The catalysts were characterized by XRD and TEM, and the results showed that the Fe2O3 was dispersed in the form of amorphous state. Attributed to the Au-Fe2O3 interaction, the modified catalyst exhibited excellent performance for the oxidation of CO.